| 摘要 |
PURPOSE:To suppress a large input level change to a satellite repeater caused by a reason for which a transmission level from ground is constant, reduce power consumption when a battery is used for a power supply and to improve the deterioration in S/N at the drop of a voltage. CONSTITUTION:A closed loop used for adjusting the amplification factor of a transmission power amplifier 9 by using the output of an AGC circuit of a reception frequency converter 3 having an amplifier section and the voltage of a battery 11 being a power supply is formed by interposing a CPU 6 in the loop. The reduction in a reception output level due to the reduction in the output level of the AGC circuit 5 or the reduction in the output voltage of the battery 11 is detected and the power amplifier is controlled via the closed loop by the detection output. |
